Fishbowl Solutions interview questions

The process didn't seem too lengthy (it was just 3 steps). However, one of the steps required a case study presentation which took several hours to prepare for and then over an hour in-person meeting to present this. I thought this went well, and they mentioned I would hear back about next steps, but I simply got an automated rejection email with no feedback. I reached out to the hiring manager to request feedback, as that's the least they could do for 5+ hours of my time going through the process until that point, but I never heard back.